The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants,
Units &
Uncertainty
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  Factor x for relating K to eV   
(1 K)k = x eV
x = {k/e}
Value of x 8.617 333 262...  x 10-5  
     Standard uncertainty of x (exact)  
Concise form:  x = 8.617 333 262... x 10-5 
 
Note: {Q} is the numerical value of Q when Q is expressed in SI units
 
Source: 2018 CODATA     
recommended values
 
Definition of
uncertainty
 
     Basis of conversion factors
for energy equivalents

 

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